package com.xiang._01;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.LongAdder;

public class MapTest {
    public static void main(String[] args) {

        HashMap<Integer,String> map =new HashMap<>();
        map.put(11, "zs");

        ConcurrentHashMap cmap=new ConcurrentHashMap();
        AtomicLong atomicLong=new AtomicLong();
        LongAdder longAdder=new LongAdder();
    }
}
